I have two CSS files. According to different screens, how can I use JS to control their import? _html/css_WEB-ITnose

I have two CSS files a.css and b.css

How to use JS statements to control the import into the page according to different conditions?

Reply to discussion (solution)

if(xxx){  document.write("<link href='a.css' ..... />");}else{  document.write("<link href='b.css' ..... />");}